Scientists have been studying the size of three populations in a grassland. In this ecosystem, lizards eat fireflies, and fireflies eat gnats (a type of insect). The data showed that all three populations were stable. Then the lizard population decreased suddenly. What will most likely happen to the size of the firefly population as a result?

The firefly population will . . .

In Australia, both opossums and foxes eat rats. The sizes of the populations have been stable for the last 12 years, but recently the size of the opossum population increased. What will likely happen to the fox population?

The size of the fox population will . . .

A population of bluefish lives in the Gulf of Mexico. Over the last 50 years, the size of the bluefish population has decreased. What best explains the decrease in the size of the bluefish population?

Scientists have been studying the size of three populations in a region. In this ecosystem, lions eat wild pigs, and wild pigs eat frogs. The data showed that all three populations were stable. Then the frog population decreased suddenly. What will likely happen to the size of the wild pig population as a result?

The size of the wild pig population will . . .

In the Arctic Ocean, sharks eat whales, and whales eat crabs. In the last 10 years, the sizes of the populations have been stable, but recently the size of the crab population increased. What will likely happen to the shark population?

The size of the shark population will . . .

A large population of ducks lives in an area with a lake. In the last 40 years, the size of the duck population has stayed the same. What must be true about the duck population during the last 40 years?

Scientists have been studying the size of three populations in a swampland. In this ecosystem, herons (a type of bird) eat frogs, and frogs eat dragonflies. The data showed that all three populations were stable. Then the dragonfly population increased suddenly. What will likely happen to the frog population as a result?

The size of the frog population will . . .

In North America, both bears and eagles eat trout. The sizes of the populations have been stable for the last 9 years, but recently the size of the eagle population decreased. What will likely happen to the bear population?

The size of the bear population will . . .

A population of mice lives in the northeastern United States. Over the last 50 years, the size of the mouse population decreased. What best explains the decrease in the size of the mouse population?

Scientists have been studying the size of three populations in Peru. In this ecosystem, pumas (large wild cats) eat deer, and deer eat grass. The data showed that all three populations were stable. Then the puma population increased suddenly. What will most likely happen to the size of the deer population as a result?

The size of the deer population will . . .

In the Arctic region, polar bears eat seals, and seals eat cod (a type of fish). In the last 7 years, the sizes of all the populations stayed stable, but recently the size of the polar bear population decreased. What will likely happen to the cod population?

The size of the cod population will . . .

What do we call the body's use of molecules for energy and growth?

Which molecule do organisms get from the air?

What are all systems of the human body made of?

Which body part begins the physical breakdown of food?

Which is NOT a function of the Digestive System?

Which organ is NOT in the Digestive System?

Which body system breaks down food and absorbs food molecules?

Which organs are part of the Respiratory System?

Which human body system take in oxygen and releases carbon dioxide?

Which organs are part of the circulatory system?

Which molecules pass from digestive system to the circulatory system?

Which body system transports molecules around the body?

Which molecule is TOO LARGE for cells to use?

Where does the human body produce carbon dioxide?

Which molecule would NOT be found in the circulatory system?

Where is the mitochondria located?

Which of the following is in the correct order from smallest to largest?

Oxygen and glucose enter the cell and go into the mitochondria and _________and____________comes out of the mitochondria.

True or False.

Each body system works on its alone

The mouth, stomach, small intestine, and large intestine are all part of which body system?

What does the body need to have in order to be healthy?

The sun has been up for several hours, and it has been shining on these trees. What can the trees do because they are in sunlight? What does this mean for the number of energy storage molecules in the trees?

These goats are eating grass on a sunny day. What is happening to the carbon in the air around the living things on the mountain? Is carbon moving into the air, moving out of the air, or both?

Will has an aquarium with water, plants, and fish that eat the plants. It is sealed so no material can get in or out, and has glass sides that allow sunlight to come in. The aquarium can also be covered to prevent light from entering.

The amount of carbon in the aquarium’s water started out high. Now, the amount of carbon in the water is decreasing.

Is the aquarium now in sunlight or is it covered? What is happening to the number of energy storage molecules in the plants and fish as a result?

Scientists are studying photosynthesis in a forest ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the forest carry out photosynthesis?

A herd of deer lives in a forest where they eat the leaves of trees. The number of energy storage molecules in the trees and in the deer has increased. What has happened to the amount of carbon in the trees and in the deer?

            The amount of carbon in the trees and in the deer . . .

This sea grass has had the sun shining on it for most of the day. What can the sea grass do because it is in sunlight? What does this mean for the number of energy storage molecules in the sea grass?

The sea grass can . . .

This tortoise is eating cactus on a sunny day. Is carbon moving into the air, moving out of the air, or both?

Lily has an aquarium with water, plants, and fish that eat the plants. The aquarium is sealed so no material can get in or out, and has glass sides that allow light to come in.

The aquarium can also be covered to prevent light from entering. The number of energy storage molecules in the plants and fish started out low, but that number has been increasing over time.

Has the aquarium been in sunlight or has it been covered during this time? What has happened to the carbon in the water?

Scientists are studying cellular respiration in a jungle ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the jungle carry out cellular respiration?

Giant pandas eat bamboo plants in the mountains of China. The number of energy storage molecules has decreased in both the bamboo and the pandas. What has happened to the amount of carbon in the bamboo and the pandas?

The amount of carbon in the bamboo and pandas . . .

Giant kelp are plantlike organisms that grow in clear ocean water. Over the last few hours some kelp has been taking in carbon from the water around it. Is the kelp in sunlight? What has happened to the number of energy storage molecules in the kelp?

The kelp . . .

A rabbit is eating leafy plants on a sunny day. What is happening to the carbon in the plants and the rabbit?

A scientist set up an experimental ecosystem in a sealed room with no windows. The experimental ecosystem has plants and animals that eat those plants. The scientist can control whether the room is light or dark with a light switch outside the room.

The amount of carbon in the air of the ecosystem started out low. Then the amount of carbon in the air started to increase. Is the increase because the scientist switched the light on or because she switched the light off? What happened to the number of energy storage molecules in the living things?

The scientist . . .

Scientists are studying photosynthesis in a desert ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the desert carry out photosynthesis?

Scientists are studying cellular respiration in a river ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the river carry out cellular respiration?

An ivy plant has been taking in carbon from the air for several hours. Is the ivy in sunlight? What has happened to the number of energy storage molecules in the ivy? The ivy . . .

A group of giraffes feeds on leaves and grasses during the daytime. Right now, it's the middle of the night. The sun is not shining and the giraffes are not eating. Is carbon moving into the living things, moving out of the living things, or both?

Reza has a glass ball filled with water that contains tiny plants and shrimp that eat those plants. No material can get in or out, but light can get through the glass when it is placed in sunlight.

The number of energy storage molecules in the plants and shrimp started out high, but then the glass ball was moved, and the number of energy storage molecules decreased. Was the glass ball moved into the light or into the dark?

What happened to the amount of carbon in the water?

A scientist who studies stars, planets, and other objects in the universe

An arrangement of stars as seen from Earth

Observations or measurements recorded in an investigation

A period of time that is 24 hours long and includes daytime and nighttime

A description of how something works or why something happens

Information that supports an answer to a question

An attempt to find out about something

The pull between Earth and other objects, which acts even without touching

Something scientists make to answer questions about the real world

To move in a regular path around something

A huge object in space that gives off heat and light

The only star in our Solar System

To make a picture in your mind using information from different sources

The length of time it takes for Earth to orbit the sun once

Something we observe to be similar over and over again

The sun, the planets that orbit the sun, and other objects that orbit the sun

Matter that is made of only one kind of atom:

A group of atoms joined together in a particular way:

What you can observe or measure about something that helps you identify or describe it:

A tiny piece of matter that is too small to see:

To use any of the five senses to gather information about something

Able to dissolve in water or another liquid:

To pull on an object, even without touching it:

Information that supports an answer to a question:

Something scientists make to answer questions about the real world:

To mix evenly into a liquid by breaking apart into pieces that are too small to see:

To describe how something works or why something happens

Something you figure out based on observations and what you already know:

The stuff that ALL things are made of

Matter that is made of more than one substance:

A glass of saltwater is sitting on a table. Which of the following best describes the matter in this saltwater?

A teacher wants to make a model to show her students that gas is a type of matter. Which of the following would best show this to the students?

Pria found a container of an unknown substance in her refrigerator. She created the following table of her observations and measurements of this substance. Which of the following questions was Pria likely asking in this investigation of an unknown substance? Choose the best response based only on the data in the table below.

A cook has containers with several white powders in them. She cannot tell the powders apart by looking at them. Which of the following would help her determine the properties of each powder?

Mary fills four small containers to the top with different substances. She weighs them and makes a table to compare the results. The substances are small rocks, paper, feathers, and a small pencil. Which substance could be the small rocks?

Maxine poured two different substances together in a glass beaker. Below are her observations both before and after she mixed these substances. Maxine makes a claim that a new substance formed as a result of mixing these two substances. What evidence from the data best supports this argument?

A hot-air balloon pilot controls the balloon by adding or releasing hot air as the balloon flies high in the sky. Which of the following best describes why hot air is used to make the balloon rise?

LaToya is making hot chocolate. She pours the hot chocolate powder into a glass of milk, mixes it, and then heats it up in the microwave. LaToya claims that since she can no longer see the powder after it has been mixed, it must no longer be there. Which of the following would not support LaToya’s claim, and instead, show that the powder is still in the mixture?

Yong pours 1 cup of liquid water into an ice tray and then puts it in the freezer to make ice. Which of the following statements about the liquid water and the ice is accurate?

Georgia has been learning about matter in science class. Her class has created a chart that summarizes the ideas that they have discovered. The teacher sets up stations to allow students to further investigate matter. Refer to the below chart as you consider each of their investigations. When Greta adds sugar to a cup of warm water, the sugar dissolves. She wonders whether the sugar is still there since she cannot see it anymore. She thinks the sugar must still be there because the water tastes sweet. Sam is not sure if the sugar is still there. The sugar taste is still there, but he believes the sugar may be gone since he cannot see it. They talk about how they can decide whether the sugar is still there. Which tests do you think will help them determine whether the sugar is still there? Mark all that apply.

Cameron tests four rocks. All of the rocks are gray. He wonders whether they are made of the same material. He does the following tests on each of the rocks to find out whether the rocks are made of the same or different materials: He examines the surface with a magnifying glass. He drags the rock across a piece of glass. If the rock is harder than glass, the rock will scratch the glass. If the rock is not harder than glass, nothing will happen to the glass. He puts a drop of vinegar on the rock. For some materials, the vinegar will cause bubbles to form. For other materials, nothing will happen. The data from his tests are in the table. Carlos believes that Rocks 1 and 4 are made of the same material. What data supports his conclusion? Select all that apply.

Derrick has a glass of water. After he adds a few drops of black dye to it, he can see black swirls in the water. After a while, all of the water is gray. If you could zoom in to see what the water and dye are made of, which set of models best shows how the water turned grey?

Julie and Michael have two white materials made up of crystals. They need to figure out whether they are the same or different. What observations would be useful for determining whether they are the same material? Choose all that apply.

A group of students created a model showing a type of matter. Which of the following describes what is shown by the model?

The substances are small rocks, paper, feathers, and a small pencil.

Substance 1 - 7.5 grams

Substance 2 - 1 gram

Substance 3 - 2 grams

Substance 4 - 3.5 grams

Which substance could be the small rocks?

A cook has containers with several yellow powders in them. She cannot tell the powders apart by looking at them. Which of the following would help her determine the properties of each powder?

Gail adds sugar to a cup of warm water, the sugar dissolves. She wonders whether the sugar is still there since she cannot see it anymore. She thinks the sugar must still be there because the water tastes sweet.

Tim is not sure if the sugar is still there. The sugar taste is still there, but he believes the sugar may be gone since he cannot see it.

Which tests do you think will help them determine whether the sugar is still there? Circle all that apply.

Yong pours 1 cup of liquid water into an ice tray and then puts it in the freezer to make ice. Which of the following statements about the liquid water and the ice is accurate?